EP4098036B1 - Instruction d'avance temporelle dans des informations de commande de liaison descendante - Google Patents

Instruction d'avance temporelle dans des informations de commande de liaison descendante

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Publication number
EP4098036B1
EP4098036B1 EP20845864.6A EP20845864A EP4098036B1 EP 4098036 B1 EP4098036 B1 EP 4098036B1 EP 20845864 A EP20845864 A EP 20845864A EP 4098036 B1 EP4098036 B1 EP 4098036B1
Authority
EP
European Patent Office
Prior art keywords
timing advance
downlink control
control information
advance command
uplink
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20845864.6A
Other languages
German (de)
English (en)
Other versions
EP4098036A1 (fr
Inventor
Qian Zhang
Yan Zhou
Tao Luo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of EP4098036A1 publication Critical patent/EP4098036A1/fr
Application granted granted Critical
Publication of EP4098036B1 publication Critical patent/EP4098036B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Definitions

  • aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for a timing advance command in downlink control information.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, and/or the like).
  • multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE).
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).
  • UMTS Universal Mobile Telecommunications System
  • a wireless communication network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs).
  • a user equipment (UE) may communicate with a base station (BS) via the downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the BS to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the BS.
  • a BS may be referred to as a Node B, a gNB, an access point (AP), a radio head, a transmit receive point (TRP), a New Radio (NR) BS, a 5G Node B, and/or the like.
  • New Radio which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP).
  • 3GPP Third Generation Partnership Project
  • NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDM e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)
  • MIMO multiple-input multiple-output
  • Example prior art is found in WO 2019/032835 A1 , disclosing, inter-alia, a UE receiving a timing advance command in an uplink scheduling message.
  • the UE may determine a delay for execution of the timing advance.
  • the invention is defined by a user equipment (UE) according to independent claim 1, a base station (BS) according to independent claim 3, a method for wireless communication performed by a UE according to independent claim 12 and a method for wireless communication performed by a BS according to independent claim 14.
  • UE user equipment
  • BS base station
  • Preferred embodiments are provided by dependent claims 2, 4-11, 13 and 15.
  • aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.
  • Fig. 1 is a diagram illustrating a wireless network 100 in which aspects of the present disclosure may be practiced.
  • the wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network.
  • the wireless network 100 may include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities.
  • a BS is an entity that communicates with user equipment (UEs) and may also be referred to as a base station, a NR BS, a Node B, a gNB, a 5G node B (NB), an access point, a transmit receive point (TRP), and/or the like.
  • Each BS may provide communication coverage for a particular geographic area.
  • the term "cell" can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG)).
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • a BS 110a may be a macro BS for a macro cell 102a
  • a BS 110b may be a pico BS for a pico cell 102b
  • a BS 110c may be a femto BS for a femto cell 102c.
  • a BS may support one or multiple (e.g., three) cells.
  • the terms "eNB”, “base station”, “NR BS”, “gNB”, “TRP”, “AP”, “node B", “5G NB”, and “cell” may be used interchangeably herein.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, and/or the like using any suitable transport network.
  • Wireless network 100 may also include relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS).
  • a relay station may also be a UE that can relay transmissions for other UEs.
  • a relay station 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d.
  • a relay station may also be referred to as a relay BS, a relay base station, a relay, and/or the like.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100.
  • macro BSs may have a high transmit power level (e.g., 5 to 40 Watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 Watts).
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • Network controller 130 may communicate with the BSs via a backhaul.
  • the BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.
  • UEs 120 may be dispersed throughout wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and/or the like.
  • a UE may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
  • a cellular phone e.g., a smart phone
  • PDA personal digital assistant
  • WLL wireless local loop
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and/or the like, that may communicate with a base station, another device (e.g., remote device), or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices.
  • Some UEs may be considered a Customer Premises Equipment (CPE).
  • UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, and/or the like.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular radio access technology (RAT) and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, and/or the like.
  • a frequency may also be referred to as a carrier, a frequency channel, and/or the like.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another).
  • the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, and/or the like), a mesh network, and/or the like).
  • V2X vehicle-to-everything
  • the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.
  • Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1 .
  • Fig. 2 shows a block diagram of a design 200 of base station 110 and UE 120, which may be one of the base stations and one of the UEs in Fig. 1 .
  • Base station 110 may be equipped with T antennas 234a through 234t
  • UE 120 may be equipped with R antennas 252a through 252r, where in general T ⁇ 1 and R ⁇ 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS(s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols and control symbols.
  • MCS modulation and coding schemes
  • CQIs channel quality indicators
  • Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signal
  • Transmit processor 220 may also generate reference symbols for reference signals (e.g., the cell-specific reference signal (CRS)) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS)).
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.
  • the synchronization signals can be generated with location encoding to convey additional information.
  • antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM and/or the like) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280.
  • a channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), and/or the like.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSRQ reference signal received quality indicator
  • CQI channel quality indicator
  • one or more components of UE 120 may be included in a housing.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports comprising RSRP, RSSI, RSRQ, CQI, and/or the like) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like), and transmitted to base station 110.
  • control information e.g., for reports comprising RSRP, RSSI, RSRQ, CQI, and/or the like
  • Transmit processor 264 may also generate reference symbols for one or more reference signals.
  • the symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-
  • the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120.
  • Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240.
  • Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244.
  • Network controller 130 may include communication unit 294, controller/processor 290, and memory 292.
  • Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component(s) of Fig. 2 may perform one or more techniques associated with a timing advance command in downlink control information, as described in more detail elsewhere herein.
  • controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component(s) of Fig. 2 may perform or direct operations of, for example, process 400 of Fig. 4 , process 500 of Fig. 5 , and/or other processes as described herein.
  • Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively.
  • memory 242 and/or memory 282 may comprise a non-transitory computer-readable medium storing one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of the base station 110 and/or the UE 120, may perform or direct operations of, for example, process 400 of Fig. 4 , process 500 of Fig. 5 , and/or other processes as described herein.
  • a scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.
  • UE 120 may include means for receiving, in one or more downlink resources, a timing advance command in downlink control information, means for implementing the timing advance command after an action time period commencing from receipt of the timing advance command elapses, and/or the like.
  • such means may include one or more components of UE 120 described in connection with Fig. 2 , such as controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and/or the like.
  • base station 110 may include means for transmitting, in one or more downlink resources and to a UE (e.g., UE 120), a timing advance command in downlink control information, means for communicating with the UE in accordance with the timing advance command after an action time period elapses, and/or the like.
  • a UE e.g., UE 120
  • such means may include one or more components of base station 110 described in connection with Fig. 2 , such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller/processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and/or the like.
  • Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2 .
  • a BS may transmit a timing advance command to indicate a change to a timing that a UE is to use for communication with the BS and/or other network devices within a network.
  • the BS may transmit a timing advance command, to the UE, in a medium access control (MAC) control element (CE) of a physical downlink control channel (PDCCH).
  • MAC medium access control
  • CE control element
  • the UE may implement the timing advance command after a threshold period of time, which may be termed an action time or action time period.
  • the action time may be defined as a particular quantity of slots after an end of an uplink slot that overlaps with a downlink slot in which the UE receives the timing advance command in the MAC CE of the PDCCH.
  • an uplink slot subcarrier spacing for the action time may be a minimum subcarrier spacing of a set of subcarrier spacings configured for a set of uplink bandwidth parts for a set of uplink carriers in a timing advance group associated with a physical downlink shared channel (PDSCH) transmission corresponding to the PDCCH.
  • PDSCH physical downlink shared channel
  • the action time may not be defined for other signaling paths.
  • a UE may receive, from a BS, a timing advance command in downlink control information, and may implement the timing advance command after an action time period elapses.
  • the action time period may be defined based at least in part on the timing advance command being received via downlink control information resulting in a different timing advance command implementation delay than is used for, for example, a MAC CE conveyed timing advance command.
  • the UE and the BS enable downlink control information based signaling of a timing advance command, thereby enabling synchronized communication in a scenario where it may not be advantageous or possible to convey a timing advance command in a MAC CE.
  • UE 120 receives a timing advance command.
  • UE 120 receives the timing advance command in downlink control information in one or more downlink resources (e.g., one or more symbols, mini-slots, slots, and/or the like).
  • UE 120 transmits a feedback message as a response to receiving the downlink control information. That is, based at least in part on receiving the downlink control information, UE 120 transmits an acknowledgement (ACK) message in one or more uplink resources (e.g., one or more symbols, mini-slots, slots, and/or the like) to indicate that the downlink control information and/or timing advance command is received.
  • ACK acknowledgement
  • UE 120 implements the timing advance command after an action time period elapses. For example, UE 120 may delay implementing the timing advance command during an action time period, thereby ensuring synchronization with BS 110 and/or one or more other network devices within a network.
  • UE 120 may determine an action time based at least in part on a specification that defines the action time. For example, UE 120 may store information identifying the action time and/or one or more parameters for determining the action time (e.g., a parameter indicating a quantity of symbols that UE 120 is to delay from an identified start time).
  • the action time period may be based at least in part on a downlink resource in which UE 120 receives the timing advance command. For example, UE 120 may delay implementing the timing advance command by a threshold amount of time from an end of an uplink resource that overlaps with an end of a last downlink resource in which the downlink control information is received. In other words, UE 120 may delay implementing the timing advance command by a particular quantity of symbols (or slots or mini-slots), such that the particular quantity of symbols starts at the end of an uplink symbol that overlaps with a last downlink symbol in which the downlink control information is received.
  • UE 120 may determine a subcarrier spacing to identify a length of a quantity of resources that UE 120 is to delay implementing the timing advance command. For example, when UE 120 is to delay implementing the timing advance command for a threshold period of time, the threshold period of time (e.g., symbols, slots, mini-slots, and/or the like) may be based at least in part on a subcarrier spacing of the network.
  • the threshold period of time e.g., symbols, slots, mini-slots, and/or the like
  • a subcarrier spacing of the first component and the second component may be based at least in part on a minimum subcarrier spacing of a set of subcarrier spacings of a set of configured uplink bandwidth parts of a set of uplink carriers in a timing advance group in which UE 120 is communicating. Additionally, or alternatively, the subcarrier spacing of the first component and the second component may be based at least in part on a minimum subcarrier spacing of a set of subcarrier spacings of a set of configured downlink bandwidth parts of a set of downlink carriers corresponding to the aforementioned configured set of uplink carriers.
  • UE 120 may determine a third component, of the length of time, based at least in part on a maximum signaled timing advance value.
  • a subcarrier spacing for the maximum signaled timing advance value may be based at least in part on a minimum subcarrier spacing of a set of subcarrier spacings of a set of configured uplink bandwidth parts of a set of uplink carriers in a timing advance group in which UE 120 is communicating.
  • the subcarrier spacing of the third component may be based at least in part on a minimum subcarrier spacing of a set of subcarrier spacings of a set of configured initial uplink bandwidth parts identified in an initial uplink bandwidth part configuration message received by UE 120.
  • Fig. 3 is provided as an example. Other examples may differ from what is described with respect to Fig. 3 .
  • Fig. 4 is a diagram illustrating a process 400 performed, by a UE, in accordance with various aspects of the present disclosure.
  • Process 400 is an embodiment where the UE (e.g., UE 120 and/or the like) performs operations associated with a timing advance command in downlink control information.
  • the UE e.g., UE 120 and/or the like
  • Process 400 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the action time period is defined in a specification.
  • the action time period elapses a threshold quantity of time after an end of an uplink resource, the uplink resource overlaps with a last downlink resource, of the one or more downlink resources, in which the timing advance command is received.
  • process 400 includes transmitting, in one or more uplink resources, an acknowledgement message as a response to the downlink control information, wherein the action time period elapses a threshold quantity of time after an end of a last uplink resource, of the one or more is uplink resources, in which the acknowledgement message is transmitted.
  • the action time period is a threshold quantity of symbols or slots.
  • the action time period is based at least in part on at least one of a first component, a second component, and a third component.
  • the first component is a minimum required quantity of symbols from an end of a physical downlink control channel that conveys the downlink control information to a start of a physical uplink control channel conveying an acknowledgement message.
  • the second component is a minimum required quantity of symbols from an end of a scheduling downlink control information to a start of a scheduled physical downlink shared channel.
  • a subcarrier spacing of first component and the second component is determined based at least in part on a minimum subcarrier spacing of a set of subcarrier spacings, the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured uplink bandwidth parts of a set of uplink carriers in a timing advance group, and the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured downlink bandwidth parts for a set of downlink carriers corresponding to the set of uplink carriers.
  • the third component is a maximum value of the timing advance command.
  • the third component is determined based at least in part on a minimum subcarrier spacing of a set of subcarrier spacings, the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured uplink bandwidth parts of a set of uplink carriers in a timing advance group, and the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured initial uplink bandwidth parts of an initial uplink bandwidth part configuration message.
  • process 400 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 4 . Additionally, or alternatively, two or more of the blocks of process 400 may be performed in parallel.
  • Fig. 5 is a diagram illustrating a process 500 performed, by a BS, in accordance with various aspects of the present disclosure.
  • Process 500 is an embodiment where the BS (e.g., BS 110 and/or the like) performs operations associated with a timing advance command in downlink control information.
  • the BS e.g., BS 110 and/or the like
  • process 500 includes transmitting, in one or more downlink resources and to a UE, a timing advance command in downlink control information (block 510). That is, the BS (e.g., using transmit processor 220, receive processor 238, controller/processor 240, memory 242, and/or the like) transmits, in one or more downlink resources and to a UE, a timing advance command in downlink control information, as described above.
  • the BS e.g., using transmit processor 220, receive processor 238, controller/processor 240, memory 242, and/or the like
  • transmits in one or more downlink resources and to a UE, a timing advance command in downlink control information, as described above.
  • Process 500 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the action time period is defined in a specification.
  • the action time period elapses a threshold quantity of time after an end of an uplink resource, the uplink resource overlaps with a last downlink resource, of the one or more downlink resources, in which the timing advance command is received.
  • process 500 includes receiving, in one or more uplink resources and from the UE, an acknowledgement message as a response to the downlink control information, wherein the action time period elapses a threshold quantity of time after an end of a last uplink resource, of the one or more is uplink resources, in which the acknowledgement message is transmitted.
  • the action time period is a threshold quantity of symbols or slots.
  • a subcarrier spacing of the action time period is a minimum subcarrier spacing of a set of configured uplink bandwidth parts of a set of uplink carriers in a timing advance group of the UE.
  • the action time period is based at least in part on at least one of a first component, a second component, and a third component.
  • the first component is a minimum required quantity of symbols from an end of a physical downlink control channel that conveys the downlink control information to a start of a physical uplink control channel conveying an acknowledgement message.
  • the second component is a minimum required quantity of symbols from an end of a scheduling downlink control information to a start of a scheduled physical downlink shared channel.
  • a subcarrier spacing of first component and the second component is determined based at least in part on a minimum subcarrier spacing of a set of subcarrier spacings, the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured uplink bandwidth parts of a set of uplink carriers in a timing advance group, and the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured downlink bandwidth parts for a set of downlink carriers corresponding to the set of uplink carriers.
  • the third component is a maximum value of the timing advance command.
  • the third component is determined based at least in part on a minimum subcarrier spacing of a set of subcarrier spacings, the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured uplink bandwidth parts of a set of uplink carriers in a timing advance group, and the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured initial uplink bandwidth parts of an initial uplink bandwidth part configuration message.
  • transmitting the timing advance command in the downlink control information includes transmitting the timing advance command in the downlink control information of a physical downlink control channel.
  • process 500 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 5 . Additionally, or alternatively, two or more of the blocks of process 500 may be performed in parallel.
  • ком ⁇ онент is intended to be broadly construed as hardware, firmware, and/or a combination of hardware and software.
  • a processor is implemented in hardware, firmware, and/or a combination of hardware and software.
  • satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and/or the like.
  • "at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c).

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Claims (15)

  1. Équipement d'utilisateur, UE, (120) pour une communication sans fil, comprenant :
    une mémoire (282) ; et
    un ou plusieurs processeurs (258, 264, 280) couplés à la mémoire, les un ou plusieurs processeurs configurés pour amener l'UE à :
    recevoir, dans une ou plusieurs ressources de liaison descendante, une commande d'avance temporelle dans des informations de commande de liaison descendante, dans lequel une période de temps d'action débute sur la base de la réception de la commande d'avance temporelle ;
    mettre en œuvre la commande d'avance temporelle lors de l'écoulement de la période de temps d'action ; et
    transmettre, dans une ou plusieurs ressources de liaison montante, un message d'accusé de réception à titre de réponse aux informations de commande de liaison descendante, dans lequel la période de temps d'action s'écoule une quantité de temps seuil après une fin d'une dernière ressource de liaison montante, parmi les une ou plusieurs ressources de liaison montante, dans laquelle le message d'accusé de réception est transmis.
  2. UE selon la revendication 1, dans lequel les un ou plusieurs processeurs, lors d'une réception de la commande d'avance temporelle dans les informations de commande de liaison descendante, sont configurés pour amener l'UE à :
    recevoir la commande d'avance temporelle dans les informations de commande de liaison descendante d'un canal de commande de liaison descendante physique.
  3. Station de base, BS, (110) de communication sans fil, comprenant :
    une mémoire (242) ; et
    un ou plusieurs processeurs (220, 238, 240) couplés à la mémoire, les un ou plusieurs processeurs configurés pour amener la station de base à :
    transmettre, dans une ou plusieurs ressources de liaison descendante et vers un équipement d'utilisateur, UE (120) une commande d'avance temporelle dans des informations de commande de liaison descendante ; et
    communiquer avec l'UE selon la commande d'avance temporelle lors d'un écoulement d'une période de temps d'action ; et
    recevoir, dans une ou plusieurs ressources de liaison montante et à partir de l'UE, un message d'accusé de réception à titre de réponse aux informations de commande de liaison descendante, dans lequel la période de temps d'action s'écoule une quantité de temps seuil après une fin d'une dernière ressource de liaison montante, parmi les une ou plusieurs ressources de liaison montante, dans laquelle le message d'accusé de réception est transmis.
  4. BS selon la revendication 3, dans laquelle les un ou plusieurs processeurs, lors d'une transmission de la commande d'avance temporelle dans les informations de commande de liaison descendante, sont configurés pour :
    transmettre la commande d'avance temporelle dans les informations de commande de liaison descendante d'un canal de commande de liaison descendante physique.
  5. UE selon la revendication 1 ou BS selon la revendication 3, dans lesquels :
    la période de temps d'action est une quantité de symboles ou de créneaux seuil.
  6. UE selon la revendication 1 ou BS selon la revendication 3, dans lesquels un espacement de sous-porteuse de la période de temps d'action est un espacement de sous-porteuse minimum d'un ensemble de parties de largeur de bande de liaison montante configurées d'un ensemble de porteuses de liaison montante dans un groupe d'avance temporelle de l'UE.
  7. UE selon la revendication 1 ou BS selon la revendication 3, dans lesquels la période de temps d'action est basée au moins en partie sur au moins un parmi un premier composant, un deuxième composant, et un troisième composant.
  8. UE ou BS selon la revendication 7, dans lesquels :
    le premier composant est une quantité de symboles minimum requise à partir d'une fin d'un canal de commande de liaison descendante physique qui comprend les informations de commande de liaison descendante jusqu'à un début d'un canal de commande de liaison montante physique acheminant un message d'accusé de réception ; ou
    le deuxième composant est une quantité de symboles minimum requise à partir d'une fin d'informations de commande de liaison descendante de planification jusqu'à un début d'un canal partagé de liaison descendante physique planifié.
  9. UE ou BS selon la revendication 7, dans lesquels un espacement de sous-porteuse du premier composant et du deuxième composant est déterminé sur la base au moins en partie d'un espacement de sous-porteuse minimum d'un ensemble d'espacements de sous-porteuse,
    dans lesquels l'ensemble d'espacements de sous-porteuse comprend un ou plusieurs espacements de sous-porteuse d'un ensemble de parties de largeur de bande de liaison montante configurées d'un ensemble de porteuses de liaison montante dans un groupe d'avance temporelle, et
    dans lesquels l'ensemble d'espacements de sous-porteuse comprend un ou plusieurs espacements de sous-porteuse d'un ensemble de parties de largeur de bande de liaison descendante configurées pour un ensemble de porteuses de liaison descendante correspondant à l'ensemble de porteuses de liaison montante.
  10. UE ou BS selon la revendication 7, dans lesquels :
    le troisième composant est une valeur maximum de la commande d'avance temporelle.
  11. UE ou BS selon la revendication 7, dans lesquels le troisième composant est déterminé sur la base au moins en partie d'un espacement de sous-porteuse minimum d'un ensemble d'espacements de sous-porteuse, dans lesquels l'ensemble d'espacements de sous-porteuse comprend un ou plusieurs espacements de sous-porteuse d'un ensemble de parties de largeur de bande de liaison montante configurées d'un ensemble de porteuses de liaison montante dans un groupe d'avance temporelle, et dans lesquels l'ensemble d'espacements de sous-porteuse comprend un ou plusieurs espacements de sous-porteuse d'un ensemble de parties de largeur de bande de liaison montante initiale configurées d'un message de configuration de partie de largeur de bande de liaison montante initiale.
  12. Procédé de communication sans fil réalisé par un équipement d'utilisateur, UE, (120) comprenant :
    une réception, (310, 410) dans une ou plusieurs ressources de liaison descendante, d'une commande d'avance temporelle dans des informations de commande de liaison descendante, dans lequel une période d'action commence sur la base de la réception de la commande d'avance temporelle ;
    une mise en œuvre (320, 420) de la commande d'avance temporelle lors de l'écoulement de la période de temps d'action ; et
    une transmission, dans une ou plusieurs ressources de liaison montante, d'un message d'accusé de réception à titre de réponse aux informations de commande de liaison descendante, dans lequel la période de temps d'action s'écoule une quantité de temps seuil après une fin d'une dernière ressource de liaison montante, parmi les une ou plusieurs ressources de liaison montante, dans laquelle le message d'accusé de réception est transmis.
  13. Procédé selon la revendication 12, dans lequel une réception de la commande d'avance temporelle dans les informations de commande de liaison descendante comprend :
    une réception de la commande d'avance temporelle dans les informations de commande de liaison descendante d'un canal de commande de liaison descendante physique.
  14. Procédé de communication sans fil réalisé par une station de base, BS, (110) comprenant :
    une transmission, (310, 510) dans une ou plusieurs ressources de liaison descendante et vers un équipement d'utilisateur, UE, (120) d'une commande d'avance temporelle dans des informations de commande de liaison descendante ;
    une communication (330, 520) avec l'UE selon la commande d'avance temporelle lors d'un écoulement d'une période de temps d'action ; et
    une réception, dans une ou plusieurs ressources de liaison montante et à partir de l'UE, d'un message d'accusé de réception à titre de réponse aux informations de commande de liaison descendante, dans lequel la période de temps d'action s'écoule une quantité de temps seuil après une fin d'une dernière ressource de liaison montante, parmi les une ou plusieurs ressources de liaison montante, dans laquelle le message d'accusé de réception est transmis.
  15. Procédé selon la revendication 14, dans lequel une transmission de la commande d'avance temporelle dans les informations de commande de liaison descendante comprend :
    une transmission de la commande d'avance temporelle dans les informations de commande de liaison descendante d'un canal de commande de liaison descendante physique.
EP20845864.6A 2020-01-31 2020-12-31 Instruction d'avance temporelle dans des informations de commande de liaison descendante Active EP4098036B1 (fr)

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US202062968679P 2020-01-31 2020-01-31
US17/137,123 US11678340B2 (en) 2020-01-31 2020-12-29 Timing advance command in downlink control information
PCT/US2020/067667 WO2021154445A1 (fr) 2020-01-31 2020-12-31 Instruction d'avance temporelle dans des informations de commande de liaison descendante

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WO2025025675A1 (fr) * 2024-04-12 2025-02-06 Lenovo (Beijing) Limited Procédé et appareil de réduction d'impacts d'avance temporelle désadaptée

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US20210243732A1 (en) 2021-08-05
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CN114982307A (zh) 2022-08-30
US11678340B2 (en) 2023-06-13

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